Hermes Agent 0.16.0 < 0.17.0 Credential Store Overwrite via File-Write Tool (CVE-2026-82020) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-82020

Hermes Agent 0.16.0 < 0.17.0 Credential Store Overwrite via File-Write Tool

Answer in brief

CVE-2026-82020 records a Unknown severity vulnerability in Hermes Agent 0.16.0 < 0.17.0 Credential Store Overwrite via File-Write Tool. The current sources do not mark it as known exploited. The current feed maps NousResearch/hermes-agent (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 28, 2026Updated Aug 28, 2026Source checked Aug 28, 2026First seen by HOL Aug 28, 2026Material review Aug 28, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps NousResearch/hermes-agent (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
NousResearch/hermes-agentgeneric	>=0.16.0 <0.17.0 \|\| >=2026.6.5 <2026.6.19	0.17.0, 2026.6.19

Recommended response

Check inventory. Check lockfiles and deployed manifests for NousResearch/hermes-agent.
Review the reported fix. Update NousResearch/hermes-agent to 0.17.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 28, 2026

Sources and claim methodology

Upstream source description

Hermes Agent 0.16.0 prior to 0.17.0 contains an improper path restriction vulnerability that allows attackers who can influence ingested message content to overwrite the credential store by bypassing sensitive-path guards that excluded the auth.json file. Attackers can craft malicious messages directing the agent's file-write tooling to overwrite the credential store without triggering any path-based protection, enabling credential tampering or unauthorized access.

Quoted source text, attributed separately from HOL analysis.